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    <h2>js关系运算符</h2>
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<script>
    let a1 = 10;
    //  console.log(a1 >= 10)

    //!= ,!==,==,===
    // console.log(a1 != '10')
    //console.log(a1 !== '10') //值和类型只有要一个不同，就认为不同
    console.log(a1 == '10') //true
    console.log(a1 === '10') //false  值和类型只有要一个不同，就认为不同
</script>

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